RAW, same settings, same camera- why file size differences?
Dec 16, 2018 18:02:43 #
rb61
Loc: Maple Grove, MN
I didn't expect this on RAW files. Copied directly from camera, did not open in an application. In camera processing for RAW?
OMD 10ii
OMD 10ii
Dec 16, 2018 18:04:00 #
rb61 wrote:
I didn't expect this on RAW files. Copied directly from camera, did not open in an application. In camera processing for RAW?
OMD 10ii
OMD 10ii
Content - a shot of a clear sky sunset will have considerably less information than a busy landscape or city street.
Dec 16, 2018 18:04:46 #
File size is dependent on how much "stuff" is in your image: number of colors and details. For example, a photo that has a lot of blue sky will have a smaller file size (MB) than a garden full of flowers.
(dang, 46 seconds too late to be first
)
(dang, 46 seconds too late to be first
)Dec 16, 2018 18:07:59 #
Dec 16, 2018 18:11:31 #
Linda From Maine wrote:
File size is dependent on how much "stuff" is in your image: number of colors and details. For example, a photo that has a lot of blue sky will have a smaller file size (MB) than a garden full of flowers.
(dang, 46 seconds too late to be first)
(dang, 46 seconds too late to be first
)But you were second to a good man.
Dec 16, 2018 18:17:57 #
rb61 wrote:
I didn't expect this on RAW files. Copied directly from camera, did not open in an application. In camera processing for RAW?
OMD 10ii
OMD 10ii
First two are "kind" and correct. I'll refrain.
Dec 17, 2018 00:57:51 #
rb61 wrote:
I didn't expect this on RAW files. Copied directly from camera, did not open in an application. In camera processing for RAW?
OMD 10ii
OMD 10ii
Depends on the images, different objects will have different amounts of data!
Dec 17, 2018 06:06:19 #
Linda From Maine wrote:
File size is dependent on how much "stuff" is in your image: number of colors and details. For example, a photo that has a lot of blue sky will have a smaller file size (MB) than a garden full of flowers.
(dang, 46 seconds too late to be first)
(dang, 46 seconds too late to be first
)Beatcha!
Dec 17, 2018 07:24:32 #
Dec 17, 2018 07:46:30 #
Gene51 wrote:
Content - a shot of a clear sky sunset will have considerably less information than a busy landscape or city street.
That would be true for JPEG but not RAW. The size of the RAW file should not change unless it's set for different compression or bit depth.
Dec 17, 2018 08:04:19 #
Linda From Maine wrote:
File size is dependent on how much "stuff" is in your image: number of colors and details. For example, a photo that has a lot of blue sky will have a smaller file size (MB) than a garden full of flowers.
(dang, 46 seconds too late to be first)
(dang, 46 seconds too late to be first
)Not true - raw files are not images, just the data stream from the chip. Every shot I take with any of my cameras (Nikon D600, Fuji X-T1, X-T2 or X-T3) are consistently the same size. Every time.
The relation of the image content complexity to file size only matters for JPEG compression. Raw files are always the same.
As to why the OP is seeing something different, I cannot answer (not owning an Oly camera) but again this is not about raw per se. Perhaps he inadvertently set a non-lossy compression option at some point (Nikon allows for non-compressed storage of the raw data which makes the files smaller, but has nothing to do with the image content either).
Dec 17, 2018 08:52:24 #
Not sure but I'll bet that your OLY is set for "lossless" RAW coppression and as such it will dump selected common pixel data and thus each image will be at a different recorded file size. If the OLY can shoot uncompressed RAW, then all images should be the very same file size.
Dec 17, 2018 08:58:58 #
Dikdik
Loc: Winnipeg, Canada
Linda From Maine wrote:
File size is dependent on how much "stuff" is in your image: number of colors and details. For example, a photo that has a lot of blue sky will have a smaller file size (MB) than a garden full of flowers.
(dang, 46 seconds too late to be first)
(dang, 46 seconds too late to be first
)Your answer had more information and was more correct. If you had have clipped the info, you may have been first. Glad you were in 2nd place.
Dec 17, 2018 09:05:21 #
Dec 17, 2018 09:16:29 #
warrenvon wrote:
This is interesting to know, and I guess in Gene's haste to be first, he didn't read the opening carefully ... If the OLY can shoot uncompressed RAW, then all images should be the very same file size.
A quick check in my file manager:
Olympus EM10: orf raw files from 13.2 - 16.9 MB
Panasonic G7: rw2 from 16.9 - 17.2 MB
Canon T3i: cr2 from 21.9 - 30.6 MB
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